#3F489A#3F489A

#3F489A is a dark, vivid blue. Relative luminance 0.080; OKLCH L 44.0% C 0.133 H 274.9°. Best body text is #FFFFFF at 8.06:1 contrast (WCAG AA passes).

Color values

HEX	#3F489A
RGB	rgb(63, 72, 154)
HSL	hsl(234, 42%, 43%)
HSV	hsv(234, 59%, 60%)
CMYK	cmyk(59.1%, 53.2%, 0%, 39.6%)
CIE-LAB	lab(34.03, 21.93, -46.12)
CIE-LCH	lch(34.03, 51.07, 295.44°)
OKLab	oklab(43.98% 0.0112 -0.132)
OKLCH	oklch(43.98% 0.133 274.9)
XYZ	xyz(10.1981, 8.0238, 31.5769)
Luminance	0.0803 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F489A #9A913F

analogous

#3F759A #3F489A #643F9A

triadic

#3F489A #9A3F48 #489A3F

tetradic

#3F489A #9A3F75 #9A913F #3F9A64

square

#3F489A #9A3F75 #9A913F #3F9A64

split-complementary

#3F489A #9A643F #759A3F

monochromatic

#1B1F43 #2D346F #3F489A #5A64BC #868DCD

Accessibility & contrast

On white

8.06

#3F489A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.61

#3F489A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F489A

8.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F489A	#FFFFFF	#000000	##FFFFFF
##3F489A	1.00	8.06	2.61	8.06
#FFFFFF	8.06	1.00	21.00	1.00
#000000	2.61	21.00	1.00	21.00
##FFFFFF	8.06	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#19549D

Deuteranopia (green-blind)

#014C98

Tritanopia (blue-blind)

#005B6A

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #3f489a;
/* rgb */ color: rgb(63, 72, 154);
/* oklch */ color: oklch(44.0% 0.133 274.9);

Tailwind

colors: {
  custom: {
    50: '#7c7ab8',
    500: '#3f489a',
    950: '#000000',
  },
}

SCSS

$custom: #3f489a;
$custom-light: #7c7ab8;
$custom-dark: #000000;

JSON

{
  "hex": "#3f489a",
  "rgb": {
    "r": 63,
    "g": 72,
    "b": 154
  },
  "hsl": {
    "h": 234.066,
    "s": 41.935,
    "l": 42.549
  },
  "oklch": {
    "l": 0.43981,
    "c": 0.13251,
    "h": 274.9
  },
  "luminance": 0.08025
}

Semantic roles & 50–950 ramp

primary

#3F489A

secondary

#B8B27D

accent

#C656D2

background

#F7F7FB

surface

#EEEDF6

border

#C9C8D0

text

#0A0911

muted

#7C7B80

Preview Lab

Preview with #3F489A

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →